package Dame;

import java.util.HashMap;
import java.util.HashSet;
import java.util.Iterator;

public class test2 {
    public static void main(String[] args) {
        HashSet<Student> hs = new HashSet<>();
        Student s1 = new Student("鲁棣",19);
        Student s2 = new Student("鲁棣",19);
        Student s3 = new Student("caicaini",19);

        hs.add(s1);
        hs.add(s2);
        hs.add(s3);

        for (Student h : hs) {
            System.out.println(h);
        }
        System.out.println("--------------------");
        Iterator<Student> iterator = hs.iterator();
        while (iterator.hasNext()){
            System.out.println(iterator.next());
        }
    }
}
class Student {
    private String name;
    private int age;

    public Student() {
    }

    public Student(String name, int age) {
        this.name = name;
        this.age = age;
    }

    public String getName() {
        return name;
    }

    public void setName(String name) {
        this.name = name;
    }

    public int getAge() {
        return age;
    }

    public void setAge(int age) {
        this.age = age;
    }

    @Override
    public boolean equals(Object o) {
        if (this == o) return true;
        if (o == null || getClass() != o.getClass()) return false;

        Student student = (Student) o;

        if (age != student.age) return false;
        return name != null ? name.equals(student.name) : student.name == null;
    }

    @Override
    public int hashCode() {
        int result = name != null ? name.hashCode() : 0;
        result = 31 * result + age;
        return result;
    }

    @Override
    public String toString() {
        return "Student{" +
                "name='" + name + '\'' +
                ", age=" + age +
                '}';
    }
}